Improvement in saw-sets



JQCOLLARV Improvement in Saw-Sets.

l' NO 131938 Pa-tented 0ct.8,1872'.

HIlIII` C opposite end of said lever.

UNITED STATES PATENT CEEICE JAMES COLLAR, OF PLANTATION N 33, MAINE. v

IMPROVEMENT |N SAW-SETS.

Specification forming part of Letters Patent No. 131,938, dated October 8, 1872.

` erence being had to the accompanyingdrawing, in whiche Figure l shows a plan, and Fig. 2 a side view of same.

The object of my invention is to produce a saw-set which will do its work with regularity and ease, giving to each tooth its proper set7 without flattening it or drawing the temper i i from the steel.

Referring to the drawing, A is a bed-piece, having holes a a a, by which it may be secured to the bench; Attached to this bedpiece, and making a part of it, is a projection, B, from which proceeds an arm, G, to which isattached, by a pivot, b, a lever-arm, D, havi ing its point d triangular, and shutting down upon the top of the projection B, which is made flat to receive it. The triangular shape is given to the point d that it may conform to the shape of a saw-tooth. The jaw e, formed by the le- `ver D and projection .B, remains open, when the device is not in use, from the weight of the Now, when the set is to be given tothe saw, it is slanted sufficiently to make the angle between the saw-plate and the llat top ofthe projection B equal to the set required forthe tooth. The lever D is then4 grasped, bringing the jaw e toggether upon` the tooth, which sets it by the pressure In order to regulate the slant of the saw-plate, arest, f, is provided, attached to a slotted springplate, g. Through its slot passes a scre'w, h, by which it is fastened to the bed of the machine. At the other end of this plate gis a set-screw, j, acting against the bed-piece,

so that the plate g can be raised or lowered by turning it, while it can be drawn backward and forward by means of the slotted plate g, and xed in any position by turning the screw h. This permits the device to be adjusted to wide or narrow saws, while the angle f set 7 may be regulated by raising or lowering the rest f, thus diminishing or increasing the angle between the saw-plate, the back of which rests upon it and the face of the projection.

' Guides fi, made adjustable by slots and setscrews, may be attached to the under jaw B, so as to prevent the saw from getting too far under the .point d.

The bed-piece A, upon which the plate g slides, may be made thickerlat the end nearest the machine, to assist in adjusting the set or slantof the saw-plate, as in setting a narrow saw, when the rest f has to be moved close to the jaws `oi' the machine. If the bed-plate were of equal thickness throughout the set of the tooth would have to be regulated entirely by the screw j but by the additional thickness of the bed-plate near the jawsthe rest is raised as it approaches the machine, and has more stability than if regulated by the screw alone.

I do not claim the devices patented by J acob Muzzy, February 13, 1849, No. 6,112; but

What I claim as my invention, and desire to secure by Letters Patent, is

The combination of the bed-piece A, projection B, and arm C, constructed in one piece, 1ever-arm D, forming with said projection the jaw e, said jaw being kept open by the weight of said lever-arm, with a rest, f, setscrew j, and slotted spring-plate g, sliding` on an inclined plane formed by the bed-plate, the said parts being constructed and arranged as herein set forth, for the purposes specified.

JAMES COLLAR. 

